How to share install.log

You'll get the download link. It allows just single download, after that it delete the file.

How to Add Domains/Mirrors to Keitaro

Add an A-record to the domains DNS:

@ IN A x.x.x.x

“x.x.x.x” is your server IP.

Is it possible to enable additional IPs on a VPS and install domains on them

Yes, it is possible. You should have an active license for every IP. Then you can enable additional IPs and the tracker will work without any further configuration. Use the license key for the primary IP address during the installation.

How to open a new port on the server

Open file /etc/firewall.bash:

nano /etc/firewall.bash

Find # Open ports and add new line with your port

iptables -A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT

(It opens 3306 port)

How to establish an FTP connection to a server after the installation

Use WinSCP for Windows and CyberDuck for MacOS applications. They allow to work with files via SSH as well as FTP.